Illinois Gas Prices
Average price per gallon in Illinois, updated 9/5/26 from AAA. Regular is currently $4.30/gal — $0.15 above the national average of $4.15.
Regular
$4.30
Mid-grade
$4.90
Premium
$5.43
Diesel
$5.85
Regular, change:▼ $0.01 today▲ +$0.01 wk▼ $0.01 mo
Regular — recent trend (92 days)
$4.60$3.98
Cheapest metros in Illinois
| Metro | Regular | Diesel |
|---|---|---|
| Decatur | $3.98 | $5.86 |
| Springfield | $4.06 | $5.83 |
| Bloomington-Normal | $4.13 | $5.87 |
| Kankakee-Bradley | $4.13 | $5.97 |
| Danville | $4.13 | $5.89 |
| Champaign-Urbana | $4.15 | $5.83 |